Using the substitution method, Ken solves the following system of equations algebraically. show your work 2x - y = 5 3x + 2y =- 3

Which equivalent equation could Ken use?
a. 3x + 2(2x - 5) =- 3
b. 369 + 3) + 2y =- 3
c. 3x + 2(5 - 2x) =- 3
d. 3- y) + 2y =- 3

Write the equations in logarithmic form 9^4=6,561

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.